You pointed out that combining apples with donuts do not produce meaningful (or valid) numbers.Let's start with the declining sales statement.

Typically this isn't held at the assessors office though, unless the tax collection and assessor offices are combined like they are in some areas. 

Lend your money as a hard money lenderYou can do a combination of these or choose other strategies.

My financing options are as follows:1) Hard money loan combining the home and rehab into 1 loan, paying interest only until my refi.2) Raise capital through various friends and family, offering about 10% ROI over 6 months.3) Get a line of credit from a company like LightStream for about $90,000.I am leaning towards the line of credit but have never done it before and am wondering if anyone on the forums has experience doing a BRRRR with a line of credit. 

My partner and i have just combined companies.

To start, @Geren Knight III. 10% combined for Repairs and CapEx, probably isn't going to cut it.

Both of those homes were over 7,000 SF and they were a combination of stick build for the big open areas and modular units everywhere else.I would be happy to sell some of my designs but I would want to be sure that they work on a specific site.

At a minimum you need 750 hours spent on real estate you ownAnd you need to spend more time on REI than any other job/ combined activities 

But I have not seen anyone do that, ergo I must assume the market is too small for such things, that borrowers wouldn't be willing to pay such a fee, or perhaps it's against the rules, or some combination of those factors. 

Think of it from this stand point in a years time you'll have two homes worth combined ($180k + $120k) of $300k for just the cost of the increased mortgage amount of a few hundred dollars a month if you're not able to have the first home paid for by your renters.