Which In the end will boost our cash flow.

Assuming that you have a properly formed contract, the short answer is that they can refuse to perform, but there will be consequences.Those consequences normally play out in court, so it's not normally worth the cost to pursue it. 

At the end of last year, they were saying ~$700k/home and w/ the way the market has been performing, I'd be surprised if that wasn't $800k.

The rental has been performing great!

Instead, finding a creative way to boost your income will allow you to stay active, even with MLS deals. 

@Anna Bee a successful BRRRR has a lot more to do with adding value / boosting the ARV than with the interest rate of the refinance; the interest rate of the refinance is of course relevant but it's not one of the primary factors that is going to make or break the BRRRR.You will likely not be able to BRRRR a condo or townhouse that is in decent shape - there is no way to get the ARV up.Check out Tarl Yarber's videos on BiggerPockets - he invests in BRRRRs in WA.

The Negotiation Dynamic is like a stage, where the performance (your negotiation with the Seller) is about to play out.And that stage is set by your lead generation strategy.

Past performance is not a guarantee of future success. 

@Gabe BelloliSelling an LLC that owns the complex vs. selling the complex itself is an advanced strategy and should only be performed by an experienced investor with competent legal consul.

Well done sirI would acquaint  yourself with the math to reflect how current or improved rent and all cost deliver cash flow for the tenant or value over time in a buy and  pure hold strategy Most investors do this on their own however they love a professional who understandS how to make these investments really perform keep it up sir