With a $35,000 renovation budget, we transformed the home, significantly enhancing its appeal and market value.

You are doing things right and I can tell from how you present yourself you somewhat understand and respect the environment.

If you go in saying that you want a reduction “just because” and have no basis for it you’ll be refused. 

Ideally, it would not need something like Zapier to connect tools, as that adds to the costs and can be clunky. 

There really isn't enough information here for someone to give you a proper answer.What you need to do is calculate those tax savings over the next 5-7 years (or however long you plan to stay in the house) vs. what the interest rate reduction will save you over that time period.

I invest here with my husband and we do also love it!

For new build to rent properties, expenses are generally lower than for older homes, but it's best to remain cautious.

Is it possible to fix a soft spot without having to re-do the whole room?

Property management is but a cog in the wheel for investors, however, one could argue it may be the most important one... 

Additionally, I'm interested in understanding typical STR fees to help estimate cash flow.If anyone is willing to share their experiences or offer advice, I would greatly appreciate it.