I’d love to hear your thoughts and maybe exchange ideas on how we can leverage these advancements. 

They are far more common now and harder to find models without but:1) these add cost to the purchase price2) they don't bring a lot of value3) they can leak or detach and damage the propertyI own around 50 doors and I cap off the line at the wall or in the basement with a valve and a cap so the potential for leaks is 0.00001% :-) 

I once bought a house that had been on the MLS for over a year.

The end goal is to have a piece of land with multiple houses: one for my growing family but also a home for my mother in law.My mother in law has agreed to foot the money on a new property/land up front and when ready we can buy land from her to build/develop etc. 

There is nothing illegal as long as the property is zoned correctly.

She currently spends 5-6 hours a month on my stuff.

There was a disconnected phone line, no website, people living in motorhomes illegally and only about 50 percent occupancy (some of those people weren't paying).

Are there any pushbacks on this deal? 

What type of spec build are you working on?

To succeed with the BRRRR strategy, focus on buying properties at a discount, work with trusted contractors, and plan for refinancing timelines.