I (barely) watched some of the podcasts cause BP shows up on my youtube feed when I travel. 

Typically starting with a smaller rehab budget of $50K or less (maybe a max of $75K) and avoiding a 1 to 1(or higher) ratio of purchase to rehab costs is recommend when you are first starting out. 

Also, you can't know how the cost of materials could fluctuate over your project time, so consider purchasing any materials upfront so you can stick to your budget. 

Based on my experience managing a significant number of rentals, leasing back to a seller can work, but it’s essential to approach it carefully.Lease Start Date:The lease should be signed at closing and start on the same day—Monday in your case.

I'm curious as to what cosmetic rehab you have to do that costs $27K? 

If you are going to do a HELOC then you must understand the cost of using those funds.  

I have found that they worked really well when it comes to getting better tenants and better rents, and having less hassle, less headaches, and then getting a higher sales price; without paying closing costs or realtor fees.

Note that legal and transfer costs are not deductible but can be added to your cost basis.

I talk to so many people who regret not getting a PM up front because they are having problems or high eviction rates doing it alone.

I'm also seeing lots of homes for sale that were used as Airbnbs, so I'm wondering if that along with these numbers may indicate it's an overly saturated market, and if these are signs that maybe I should keep searching for a stronger market, or just a property that cash flows given the average annual revenue?