Unorthadox gutter protection idea
I have an unusual gutter situation with an attached carport and patio roof. I have a similarly unusual idea to deal with it but want to be told if I'm being crazy.
Both structures are corrugated aluminum, attached just below the roof of the house, with an adequate slope away from the house. At the far edge of the structure there is a gutter attached to the underside of the roof in such a way that it is impossible to clean out the debris by hand. A powerful leaf blower does only a so-so job.
Additionally, there is a downspout that drains directly onto my driveway and two downspouts that drain immediately adjacent to the patio and thus cause flooding of the patio. (I wish I could ask the builders what they were thinking)
So I'd like to run the downspouts into buried PVC pipe to prevent flooding and further water damage to my concrete, but I don't have a good way to prevent leaf debris from getting in using any of the commercially available gutter guards (they just won't fit into these irregular gutters).
My plan is to fill the gutters with pea gravel or crushed drain rock and find some way to cover the downspout openings to keep the gravel in. I don't think I could get landscape fabric or another silt barrier in there (I can't fit my hands into the gutters), but I guess I would have to attach a few cleanout holes to the downspout drains and use them frequently. The gutters are relatively small and appear to be actual structural members of the carport/patio cover so I don't think the weight would be an issue.
I feel like this has a decent chance of working but would like opinions because
a) when we eventually sell this house I don't want a home inspector to think I'm insane
b) since I can't even fit my hands in the gutters I won't be able to undo this.
c) I can't find any evidence online of this having been done before (although I can't imagine I'm actually the first person to think of this).
I'd appreciate any advice/opinions and alternative solutions.