She started a second truck to double our service business (still legally 100% my business), is getting a graphic design degree to freelance as a side hustle, and is 100% on board with my RE goals (albeit she doesn't nerd out on BP Like I do).

Thanks @Terry Lao, interesting graphic.

I would then have a lawyer draft a guaranteed maximum price (GMP) contract for your builder to sign with a very thorough scope of work and set of construction documents incorporated.

I would suggest looking at East LA (zip code 90063), its in a non-incorporated area of LA, meaning no rent control, and its a bit easier to find housing.

Do you charge them the cleaning fee separate or incorporated with their charge for the whole stay? 

I chose this because i'm looking for cash flow and looking to achieve financial independence before 30 -- I am 21.Knowing my niche and some of my criteria, I was wondering if I should consider incorporating.

Thus, I need someone competent to do a thorough financial analysis to help me understand where the swing points are in the tradeoff where one option would make more sense vs. the other one.Something along the lines of:https://www.nytimes.com/interactive/2014/upshot/bu...but which also incorporated my current investment property holdings.

Good that you bought it as an LLC, because it sounds like a law suit waiting to happen.If I'm reading this correctly, my recommendation would be to encourage the tenants to move, then start over with a new design, making sure to incorporate someone who knows a little about building codes. 

Were the later materials actually "incorporated into the house" (I assume they were not acting in any way as just a "material supplier" so simply buying them and even delivering them without installing them would not count as work).

I'm partial to instagram and wordpress has built-in widgets that allow you to easily incorporate your instagram feed into your page.