I would recommend a different marketing piece every 4 weeks for 5-7 months from past data analysis, but you should test this out for your market and see what works best response rate wise.Also, when you become more advanced you will want to do split testing and other methods.

If my thinking is wrong there then please correct me!

I’m sure most of you have seen the recent article about the BRRRR method.  

I have 4 properties using this method. 

If they do, it's probably not done correctly. 

and how much profit you are willing to take with each method.

I have seen evictions thrown out of court for failure to follow legally prescribed methods of service.

I know there are complications with loaning to an LLC, so is a partnership the correct structure?

He sees the market going up, and that it’s a sellers market, and says I should wait for the next crash to happen before I jump in"  If the market was assured to keep going up you would probably be ok, but what if it corrects, just as you jumped in. 

@Jared Huffman , Linda D. is correct.