I've been investing there since 2019 and my strategy hasn't changed at all, even with rates the way they are now.The midwest has a lot of good options right now.

Another option would be to address the heating system itself.

Lease option is a viable way to *extend* your exit strategy, but the reality is that most lease options don't sell to the option buyer. 

I am using the DSCR loan which is the best loan option for me right now.

What options would I have as an exit strategy to get out of paying this high amount?

This has resulted in an unexpected financial burden of $7500.In light of these circumstances, I am seeking advice from you all on the legal options available to me.

There might be cheaper options, but it's important to remember that you often get what you pay for. 

The option that I am entertaining is to purchase a multi-family that will cash flow enough so that altogether, the two properties cash flow positive.

Currently I only hold stock, options, and crypto as I am just starting out in my real estate journey

Working with realtors for valuable market insight and contractors for scope of work might be a good option for you starting out if you don't have experienced flippers you can work alongside that know this stuff.