The U.S. market can indeed be complex, especially when considering international factors like taxation and financing.While I'm not based in Germany, I do work with a number of out-of-state and international investors who are interested in the Indianapolis market, which offers strong returns and more approachable entry points compared to coastal U.S. cities.

Assuming you're contracting it out make sure you get multiple bids and I'd do the bare minimum inside or do that yourself (unless you're going to make it a hangout spot as a feature for guests - could also do this over time as you see increased cash flow).

We have a 50 unit apartment complex and a local Subscription based Roadside Assistance company wants to partner with us to provide our tenants with unlimited priority roadside assistance services.

It is a Pro membership feature but the data is INSANE value for LTR metrics. 

If the software is not simplifying your life or making you more accurate, you shouldn't use it.Software does have extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

This arrangement aligns the interests of both parties, as the builder is motivated to keep costs down and ensure a profitable outcome.Builder's Overhead: The builder’s overhead, including staff salaries and administrative costs, can be a bit more complex.

My question would be, is this a good idea, or am I creating unnecessary complexity in the business structure? 

Tax Deeds are complex deals but once you fully understand the process you find incredible deals. 

Have just hired a bookkeeper and at first she questioned having so many accounts but is now finding it a simple way to deal with the complexity of the fact that I have 7 properties and in keeping track of everything.

If you find that properties without central AC are sitting on the market longer or renting for significantly less, that could be a sign that it’s an important feature in Columbus.Ultimately, while the lack of central AC might narrow your tenant pool, it doesn’t have to be a deal breaker if you can find ways to compensate, either through rent pricing or future upgrades.