So assuming they pay retail for the unit (they won’t), plus lets say conservatively $1000 for parts to install it (they won’t cost nearly that much), and it will take 10 man hours to install (they should be able to do much faster), that’s an imputed hourly labor cost $1120.

I paid for v4.x, in installments, and it was so weak I canceld leaving 2 of 3 payments on the table.I've been a user of propstream.com for quite a few years. 

It has been recently introduced and is supposed to put a cap on the cost to install utility hook ups for new construction and ban hedge funds and corporate entities from buying single family homes in California):SB 1210"This bill would, for new housing construction, prohibit a connection, capacity, or other point of connection charge from a public utility, as defined, or a special district, as defined, for electrical, gas, sewer, or water service from exceeding 1% of the reported building permit value of that housing unit.

There can be some great deals new (that typically include install for a reasonable fee) and also I've found some awesome deals on FB marketplace.  

If all I am going to do to rehab the property is fix it up, make it look nicer, install new kitchens or baths then I tend to look at it as a flip.

Blinds installed, burn hole in decking repaired, HVAC unit repaired; not blowing heat. 

I paid for the banner and the installation. 

Install driveway ?

In one unit we installed a tub/shower combo, four pieces I believe.

While the $135K note qualifies for section 453 installment sale treatment with the gain spread out during the payment period. 1) Is my understanding of this transaction correct?