For example: roof, hvac, plumbing, electrical, appliances, decks/fences, floor covering, windows/doors. 

May do the outside, roof, gutters, deck, etc.

I can see the property from my back deck and its location is great and in a very desirable school district.  

If you want a rooftop deck, which is quite popular around town, it might be an additional $40K to $50K.

Lost the window, had to rebuild the deck and part of the roof along with a portion of the wall.We were insured by Safeco.

There are so many so be sure to filter by your location. 4) Review this comprehensive 64 page deck on the state of the 2023 housing market (in your resource page as a member of BiggerPockets!)

If it costs $25k per deck and I can only get $150/month more for the 2 units per per property that have no deck currently, does that make financial sense?

You need to put together a complete package including the a nice pouch deck with business plan and personal financial package before you can get the banks attention.

One thing you will definitely want to invest in is a blade for cutting non-ferrous metal (aluminum) in your miter saw to cut the crossbar on top that the door will hang on precisely.

Sure fire ways to increase the value of your home according to Real Simple would be to update paint, add siding, build a deck and update the kitchen and bathrooms.