They have done my last three conventional loans, and with my primary residence I am at the limit for 20% down easy money.  

With the limited information you have posted, I think that is likely the best case scenario.

Maybe your municipality is lenient on that or allows like homeowner's permits or something, but most cities require a licensed contractor to pull a building permit.  

If you don't then you are going to limit your success.Negotiation Ability: You need to have a system that you can use to negotiate with the seller and also deal with the buyersBrian Gibbons will definitely give that to you if you stick with it for the long haul

Would it be beneficial to have them formed under a Limited Liability Company or Partnership?

To answer; some lenders allow you to have up to 4 properties with loans and other lenders allow you to have up to 10 properties before you need to move to local banks without a limitation or commercial loan options.  

I currently have limited personal knowledge about real estate investing but I'm here to learn and doing seems to the best way to do that.

But you could limit bathroom usage to 10 mins in the mornings if everyone is trying to get ready at the same time.

You will pay income tax on the amount you move but depending on your situation you can limit the amount you transfer in any one year to keep the tax low.Once money is in a Roth IRA any future qualified withdraws are tax free.My business partner and I were both laid off for part of last year and chose that as a time to make the change.  

Is there a time window or are there other limitations for getting a writ of abandonment?