You are free to do whatever you want after. 

House hacking could possibly at least cut that painful expense so not saying you shouldn't do but really watch your numbers.

"What important things do I need to keep in mind when working with an LLC associated with wholesaling?"

If you are specifically asking about the requirements to get licensed you'll want to do a google search for you local laws and requirements.

Learning how to properly evaluate a rehab budget is imperative to your success and there are many books and posts on this topic of how to do it - I have posted many on this topic in the past.Don't forget on your list windows/doors, trims (baseboards and door casings), waterproofing/protecting floor of garage, potential need to frame/or upgrade farming of exterior walls of garage (many garages have stem walls) and the flooring is often sloped to garage door so leveling the floor may be necessary.

Do you think interest rates will rise in the near-future?

After that, I'd paint and put a new kitchen in (likely do these myself, which I have done before).

I have been a landlord for 13+ years and never had a full month of vacancy unless I was doing a renovation, so something is off here

Also, what people do with wealth once they have it isn't necessarily how they made it to begin with 

Quote from @Jason Baker: Quote from @Jay Hinrichs: when you say no fee,  no split.. how do you expect the brokerage to make any money ???