Another thought I am having would be to set up a series LLC where we have the shell company and 3 other series underneath that one to be run by each member of the shell.  

I am currently working on a split level where the floor plan of the upstairs is about 3 feet larger than both ends the garage underneath it.

I still remember things I learned in the soils, structures, concrete, pavement engineering and water resources courses.

I have found more mold underneath the counters and cabinets in the kitchen and she is denying it and I found proof that they painted over mold on the walls so they did know about it.

I have a check-list that inspects for a series of items: soil condition and drainage (includes gutters and foundation), landscaping, roof, exterior/interior walls (especially around doors and windows), plumbing (under the sinks and toilets), flooring condition, etc. 

On our side, we took out the carpet and refinished the lovely hardwoods we found underneath, upgraded the stove, painting, and upgrading fixtures.

I would recommend getting a contractor, soils engineer, structural engineer or general inspector to look over the property and give you a better sense of what's going on. 

The series LLC will allow you to create unlimited child series underneath the parent entity so they will scale with you as you grow your business and eliminate the need for multiple traditional LLCs which would require multiple filings, fees, etc so would be costly and time consuming.

I don't have anything to offer with your question beyond what everyone else has said but I just want to let you know some general rules with foundations:1. crawlspace - cheapest to repair, good for plumbing because they can run underneath the house and easy to repair, bad for really cold days, pipes could freeze, some people complain about moisture in crawlspace and tile cracking but that's a long term issue and you may not have to deal with that and if you do, just lay LVP2. slab - second cheapest to repair generally, worst for plumbing because to fix, you have to often remove flooring and drill into the concrete to fix leaks and I've had a house that I played whack a mole with an active leak3. basement - most expensive to repair, okay for plumbing, but your basement could leakIMO crawlspace is the gold standard for foundation for rental investments in older properties (older than 1950s).

Hi Garrett,Just off the top of my head, here are some of the steps you might want to take.Seek a construction lender for the job as as well as a lender for when you are stabilized.Find out what the Lender Requirements are for YOU (and your Partners and Co-signers) and for the Project, and work to meet the requirements.Open your dialog with a Lender(s) early on, and keep an eye on interest rates if they flux up you may want to reconsider doing your build.Talk to an Architectural Firm (that has built recently in the area) apartments of the size and type you are wanting.Ask them for some rough (You Spend) figures with timelines on them and see if that matches your Vision for the project (be ready to take out your checkbook for this).If it's a GO, have them recommend a General Contractor for the job (that has built recently in the area) apartments of the size and type you are wanting.If there are tax incentives tied to the project for certain renter classes have your CPA figure that into your projections.Consider any "Dirtwork" (soil engineering for poor soil) or required "Drainage" costs on your chosen site (or shortlist of sites).If it's a GO, tie up legal control of your building site.Note: Big construction can Bite you in a Big way if you have little experience in it.