A key takeaway from this deal was the importance of acting quickly in a competitive market.

You're losing money from lack of income, but you're losing more money because it's paid off.

The pre-qualification letter only says they've quickly looked at your application and think they can do the loan - not good enough in a competitive market.Some listing agents are requiring the buyer be pre-approved by the agent's lender of choice. 

To add insult to injury, I was charged an additional $1,000 for Flip System providing me this problematic deal.My disappointment continued with the lack of educational value provided by Flip System.

You need every competitive edge you can get to have maximum exposure.

They may close fast in competitive markets, with an LTV ratio ranging from 65% to 75 percent.

Given your presumed lack of real estate experience, OPM (other than 'traditional' bank financing) is likely off the table for now. 

Helps establish authority and trust in highly competitive markets. 2.

If the buyer has good credit, you might go lower, while buyers with poor credit might justify a rate closer to 9% or 10%.Market-Based Adjustments: Keep in mind the current prevailing mortgage rates (which are currently around 6-7% for traditional financing) and adjust accordingly to stay competitive while still reflecting the added flexibility of seller financing.3.

Affordability or lack there of has the best chance of slowing this market but there appear to be plenty of buyers in all price ranges.