I posted this on the small house forum but I think everyone is just as baffled as I am so now I am taking a stab here. I read some of the questions and answers and I feel you might be able to help me!!

Okay so here is the background:

My house is a small log cabin which was later added on to to equal about 980 sq ft. The wlls are unable to come down and the floorplan is very inefficient. I been on a two year remodel project but I still don't have room for all my stuff. Well actually I did but now my dad moved in so now I no longer have room again and I feel like I am back to square one.
I was going to sell and buy a new house but after seeing the prices of whats out there I would rather renovate and stay than to move and probably wind up renovating that place. sooooo long story short I decided to keep love it not list it.
here is the sketch to scale

Currently:
room 1= unheated sun room and front entrance (never used)
room 2= my bedroom (originally the living room thus the fireplace in the front)
room 3= my dad's room with two closets side by side taking up the whole back wall and full of mostly my stuff
room 4= my livingroom with two storage closets
room 5= the kitchen
room 6 the mudroom/laundry room back door here
room 7 the only bathroom

The problems:
-I want a bathroom and walk in closet
-I want a place for my grandkids to sleep when they come over (they now sleep in my bed and I sleep on the couch)
- I want some privacy
- I would like to have a dining room
-I would like a small enclosed porch (I have too many mosquitoes to sit outside)

My proposal

room 1- my dad would like that as his bedroom but it needs to be insulated and the door needs to be closed off
room 2- make that the livingroom
room 3- kids room/sewing room.... left closet for dad... right closet for all my fabrics and craft supplies (YES!!)
room 4- would like to take out the two windows between the storage closets and make that the front entrance

and make this room the dining area with a full wall of shelves for my books (this is an old photo but you see the area best here)

also in this room I would like a built in corner cabinet to hold extra dishes see sketch for placement

room 5- still the kitchen
room 6- still the laundry area would like to close it off and make it an exclusive laundry room
room 7 still the bathroom

I am thinking the area where the deck is move it over a bit and make that the area where you come in and incooperate a sitting room/ enclosed porch and somehow include the entranceway, something a little bit wider than this

close off the laundry room, make the sunroom connect to�my bathroom, bedroom and walk-in closet. ...like my own wing

I really don't want all the available space to be added on, just showing the max...�I really can't afford all that. my bathroom can be 5x9 with no tub just a walk in full size shower, toilet, & sink

I don't know what size a normal walk in closet should be but I found a 8x10 closet that is big enough to have a few drawers for sweaters, about 30 pairs of shoes, and enough room for 2 people to hang a full wardrobe of shirts and pants Is that too big?

Bedroom, would like room for queen size bed, a chair, a 2x6 cabinet that has a fireplace in it,

Stipulations:
-because the walls are logs no walls in rooms 1-4 can be knocked down and between 5 and 6 the stairwell must remain
-the parking area has to remain untouched

Area A is my "wing and can come all the way to the house
soooo
looking at sketch 2:
in the space marked available I would like to have my entrance which is also a sun room or place to sit and look outside (see photo above), and my bedroom suite which would consist of a walk in closet, bathroom and bedroom. I would also like my part of the house to be able to be closed off by a door so I can lock it and the kids can't get into it when I am not home.
Just because it is marked available does not mean I have to use the whole area. I marked off the maximum dimensions but I need to make this renovation as cheap as possible.

What i would like considered:

lots of light.
price
most bang out of a modest amount of space

question:
What is the most efficient siding method?
where do I move my patio/barbecue area to? The checkered area in the aerial is the current "patio" and the same place that I allocated for the addition

How do I get the plans drawn up?
What are some lessons you learned?
What is the most efficient way to do this?
How much do you think is the least I would spend on this renovation?

To me this does not look like a lot but I don't know maybe it is more than I think

I want a lot of space on a little bit of money.. you know....the American dream LOL

HELP???