There are a lot of "rules" that sometimes change every year, so your CPA/tax guy needs to be current in his/her knowledge about this area.Lastly, I don't think you'll need a business license, but you should check with your local city and county offices on their rules.

Everything I've said above about LLCs applies to the Series LLC as well.

(Assuming it's not against forum rule.)  

Does you city/subdivision have any rules for nuisance trees?

If TSPs are anything like 401ks, it will depend on the rules of your particular plan. 

Account ClosedSeconding the concept of "just don't go there".IRS rules are strict about avoiding any direct or indirect transactions of provision of benefit between and IRA and a disqualified party, in either direction.You and any LLC you own are disqualified to your IRA.The IRA may not lend to you or any entity owned by you or a disqualified party.The penalties for engaging an a prohibited transaction are severe, and not worth messing with. 

@William HustonSo you’ll barley get the 1% rule if the all the numbers are accurate .seems like your typical marginal deal .

However, your agent can ask the seller's agent if there are any rules about rentals prior to making an offer - sometimes they will know sometimes they won't. 

All payments under this Agreement are applied first to accrued interest and then to the balance of the outstanding principal.

The same question applies for paying off the mortgage early - you have relatively cheap money that you're getting from the loan so you might as well let it ride.