The company offers promissory notes worth $50k, $100k, and $200k+, with annual interest rates ranging between 12% and 16.7% depending on the investment amount.

You are going to get a wide range of opinions here and they are all right...for them.

Their role is purely administrative, so if you file incorrectly or choose the wrong entity type, you’re on your own.3.Hiring a Lawyer or CPA (White-Glove Service):This is the most comprehensive option, with costs ranging from $1,000 to $3,000.

I am starting to see some homes though in that price range. 

Knowing the Fort Collins market and it's price points a little bit, it doesn't sound like you're capitalized quite enough to get started flipping, especially when factoring in risk (properties in the $300-400k range will be high risk, not good locations).

The other 2 had balances in the $13k-$25k range.

Versus other areas are more in the 50k to 80k range. 

At that time bitcoin was still in the $200-$500 range, and he had over a $1M in bitcoins on them.

I was thinking the house would rent for 1200-1350 but it seems now the range is 1000-1200 with 1200 being the highest for the area so may be hard to get.

Banks and Credit unions in the 7-9% range.