I'm currently grossing around $2,900 in rent per month.

I am a current college student and gained interest in real estate as I am working on a project focused on finding ways to expand opportunities for real estate investors.

In CA currently only MF properties are rent controlled.

The current lender refuses to do a loan assumption. 

Depends on your goals and the current market.

Will you be keeping or selling your current primary?

. - Current owners have surveys, this is a new subdivision.- Public sewer available.- Current owners purchased many lots and they haven't developed them.

Quote from @Hector Romero: Hello all, I am new to the community as well as being the lead in real estate investments.My sister and I currently hold 3 properties next to each other in Riverside County, California (we'd like to get them in an LLC but we're unsure how that may affect financing them).

Then over the course of the first year or so, if you could raise the rents by a total of $1k/mo (they are currently $2k, $1k, and $1k), then you might be able to pull out about $60k-$80k in a cash out refi. 

Nd what housing is currently attracting the highest CoC and total returns potential - studio - 1bd, 2 - 4bd, or 5+bd?