We have a mix of a and b level rentals but also obviously do low income. 

Then get some fast setting  hydraulic cement and mix it up a bit wet and fill the bag .

I am looking at a mixed use building with retail/office bottom floor and apartment upstarts as residential.

I am handy (plumbing, electrical, general DIY) but will have to sub out anything major since I am full time in a tech consulting job. 

I have my contracting work keep me a float to get started.My number one passion has always been writing software but it would be really exciting to see how I can mix this with Real Estate.

If you're looking to network we have a meeting the third Thursday, 6:00 PM of every month at Caribou on Ingersoll.It's a mixed crowd of experienced investors, contractors, and learners.

Perhaps the Palm Springs or Big Bear area and add vacation rental to the mix.

Same question for window covers - mixed light drapes around the house - worth doing better window coverings?

Is it subject to UBIT and can it be mixed with personal funds?

Commingling different types of contract obligations with various investor strategies, at an investor's whim, is dangerous, your contracts must "fit" the strategy to be used.I'm not saying you can't mix contract obligations, I'm saying you can't employ just any strategy (like wholesaling) with agreements that, in this case can't be assigned lawfully unless you modify your strategy to conform to the type of agreement being made.