The main issue is that to do the ADU you have to spend so much bringing other items up to code like electrical, plumbing, lighting (windows) and egress.

I recently relocated to Arizona, drawn by its rapid industrial growth, particularly in high-potential sectors such as semiconductors and electric vehicles.What I Bring to the Table:I have hands-on experience as a real estate agent during my college years and am currently exploring opportunities to transfer my license to Arizona.

Roof, plumbing, electrical upgrades? 

The roof, AC, plumbing, electrical and flooring will eventually need replacements.

Electric heaters are dangerous and can start a fire if left unattended.

I have two options 6.625% 30 year or 6.15% 15 yearI want to invest aggressively in the near future on more propertiesThe loan is only $110k and the monthly payment for 15 year is $563 and $750I will earn 2-3k a month in gross rental revenueThe property is in a declining population areaRecently rennovated, and all major things were relatively recently improved such as plumbing, the roof, a/c, electric, etc.Will require a lot of management as it is rent by the room so I may switch to a normal rental after 10 yearsI'm trying to find what will mathematically net me the most money in the long run.

We have had a pipe burst during the cold winter months, the roof needed to be replaced (thankfully covered by our insurance), and some issues with electrical, which hasn't been majorly updated since it was built in 1973. 

If there’s specific projects like electrical we get a project specific estimate after we put it under contract prior to the earnest money going hard.

Already has some electric and plumbing hooked up.  

It was a huge investment, but it cut the electricity cost by the full 2K per/mo all summer.