Or if you do buy older buildings, renovate them extensively to ensure they will last longer and give you less on-going maintenance.

At that time, offer a full lease extension (might even be able to push the rent up a bit, but I'd focus primarily on getting yourself back on-season and then get a lengthier/standard 1-year lease signed.

Sorry, but they have no obligation to accept your extension request.

Pushing back the house etc, will be an extensive remodel.

I'm no VA loan expert, but I don't think properties with extensive renovation required qualify. 

You found the tiles and there is more; but it is not a big deal, unless for example, there is a forced air heating system and you decide to do an extensive re-model.

All of the units will need extensive electrical, plumbing, sheetrock, fixtures, probably gas lines, some need masonry work, another has termite damage, two others have mold from failed siding, there is some roof repair to be done, tiling, basically everything.

@Matthew Anderson be sure to double check the expiration date of whatever lease/ extension that is current for this tenant.

Make sure you are choosing a mentor that has extensive experience over a decent period of time. 

It could be a 10 page promissory note which outlines all kinds of conditions under which various extensions, penalties, and default conditions might apply.