Updates:Audis are not meant to be trucks...my suspension broke...I should probably add that to renovation costs:)Finishing up the floor today, most of the painting is done, new doors and new windows went in, we put together the cabinets and installed them, rewired most of the apartment, eliminated the old "knob and tube" wiring, etc.When they say everything that could go wrong , will go wrong....they are not kidding.

To demonstrate my technical competence, for my personal house I built a steam shower, installed radiant barriers with rock wool, and a wood stove insert with bathroom radiant heated floors and re-designed radiant floor heat zones, cutting winter energy consumption to 1/8, installed a whole house fan cutting summer energy to 1/2, extensive localized landscaping leading to a reduction to 1/8 the yard work, plus random quality of life improvements like wifi switches, heated floors and toilet seats, skylight install, exposed structural beams, and master bedroom laundry including electrical and plumbing, cathedral ceilings with skylights, a steam shower with wifi controllable lighting and music, concrete countertops, etc. 

Hopefully you have a tax professional, so you don't make DIY mistakes on that too.

Get the free removal and delivery/installation and have the tennant coordinate that.

We need a cost segregation report for a 32-unit complex and this should be a must cheaper option but would like to hear from people who actually used their services.Thank you,Gerardo@Gerardo WaisbaumHi Gerardo - I personally use DIY for my own cost seg studies, even on larger buildings.

I fixed up the house by installing new flooring in the living room, got a long punch list of actions done to improve the residence and furnished it.

If you decide the deck is a must you might look into installing a covering or getting it heated....?

Are you willing to have them, at their expense, install a commode to accommodate their needs?

Is DIYing a foolish idea and if so, why?

As mentioned before soundproofing would be helpful, as well as making sure each guest has their own private space outdoors.If you don't have smart locks, I'd highly recommend getting them and installing on the front doors.