I've been hoping to include a greenhouse, in my farmhouse renovation, but it sounds like they can be a lot of trouble and expense. Would it make more sense, to have the greenhouse addition on the southeast side of the detached garage (which will have a breezeway to the house) and a screened porch with the house?

Since we have such long winters, I was hoping to have the porch be a glass/screen combination...so we can use it as a mud room in late fall, winter and early spring. As the weather warms up, it would be wonderful, to use the screens and have a bug free area to eat and sit out, in the evening.

Any thoughts, ideas, suggestions? Thanks for the input :)