Not sure of a product out there to help this but 7.5% interest rates sound like you either refinanced recently?

Also, as mentioned above, this is a great way to start building relationships with small local credit unions and banks which offer the best loan products for investors. 

I've found the product to truthfully be better than an Anderson 100 series window and while I've been fortunate not to have any maintenance issues thus far, my supplier who I've worked with for a few years and trust has made a point of emphasis in saying their warranty response is excellent.

If he has only one product in inventory and it’s not selling, then he has no profitable products to offset the loss. 

Hey Zane, I work for a production builder.

The first prototype will have all specified fixtures, finishes and products as My wife and I like and approve.

I’m looking for a list of suggested products (cabinets, flooring, tile, etc) to rehab the interior.

Now I use a more sophisticated tool that provides me all the tax sale lists nation wide and reduces drastically my research time. if anyone wants to check it out: www.fastlien.co 

https://store.biggerpockets.com/products/the-house-hacking-s...

Like many (most) businesses it requires an investment of capital; money expenditure for ongoing marketing; management of operating, marketing and professional personnel; keeping accounting records and filing tax returns; established sales practices; constant monitoring of goals, budgets, and productivity; establishment and implementation of operational systems; and providing customer service.