@Tony Karns have you considered tile?

Are you looking for one contractor to do all the work or a painter to paint 100units, a tile guy for 100 units, etc.?

I have these ceiling tiles.

In kitchens and bathrooms, I'd use glue tiles. 

Most flippers use the same light fixtures, plumbing fixtures, tile, paint, flooring and everything else on every job.

For example, tile flooring i got the second cheapest put diagonal in a very expensive home and it looked amazing.

I was eating pb@j sandwiches everyday because in my mind I couldn’t dare do laminate I had to have granite, god for bid a tile was laid slightly crooked, I’d rip it all up.

Built on top of existing back porch.Exposed wiring in the attic that lead to non GFI outlets in the soffit.Outside had not been painted in over 15 yearsWhat was done: Trash-out and DemoTear down Sun room and repaired porchProperly repaired electrical in atticPainted inside and outside of house.Painted roof (yes, you can do that)Replaced floors with new laminate and carpet throughout the houseReplaced old almond color switches, outlets and covers with new white onesNew lights and fans throughout the houseCompletely redone bathrooms with new tile, vanities, mirrors, lights.

That tile backsplash is to die for.

It's a great start that you have all the receipts and excel list, but you need to have a professional take a look if you want something that would be defensible to the IRS.To answer your questions: windows are generally considered structural so they'll be 27.5 year (unless they're a part of a 5 or 15 year asset - rare but possible), the floors depend on what they are and how they're installed, carpet and laminate are generally 5 year, solid hardwood and ceramic tile are generally 27.5 year, the deck could be 15 year or 27.5 year depending on how it was installed.If you'd like to have an in depth discussion on this and see some numbers PM me.