None of the above. You need to hire a company that specializes in siding. If you are going to replace in wood panels everything you have needs to be taken down. If you chose some sort of vinyl you can probably go right over the top of everything and wrap smaller areas, fascia, trim...

From all of the different areas you could end up paying thousands to patch it up. Having the siding redone might be about the same price. Either way because you are selling in 2-3 years you will for sure need siding redone before sale unless you want to get 80% of what you could get. Might as well get it done and enjoy it.

None of the above. You need to hire a company that specializes in siding. If you are going to replace with wood panels everything you have needs to be taken down. If you chose some sort of vinyl you can probably go right over the top of everything and wrap smaller areas, fascia, trim...

From all of the different areas you could end up paying thousands to patch it up. Having the siding redone might be about the same price. Either way because you are selling in 2-3 years you will for sure need siding redone before sale unless you want to get 80% of what you could get. Might as well get it done and enjoy it.