Stairs are the only way to get in, no grab rails in the bathroom, ramps that are too steep, etc.From what I've read, all commercial businesses/buildings (including ones before the ADA was passed) have to comply with the rules, unless it would be outrageously tough to fix (like installing an elevator in an already built building).Are all these local business just not complying and taking the risk, or am I missing something? 

I would put it in your listing details and also potentially house rules. 

There is no such absolute rule or mandate for REI - it is up to you on your comfort level with your cash flow versus total investment versus appreciation potential.If I followed that rule, I would have missed out on a LOT of great opportunities over the years.We bought a house in Jones Valley in 2017 with negative cash flow - why? 

Next, I would look into where you can find the 1% rule (aka positive cash flow) and fast appreciation. 

For existing properties, you must make substantial improvements (equal to the property’s value, excluding land) within 30 months.Ensure the duplex qualifies as an OZ investment and complies with QOF rules.

The "land basis" cannot be depreciated, so your depreciable portion will be lower than $350k.We typically consider $1 million in building basis as a rule of thumb where it makes sense to evaluate the potential benefits.

The most important rule is to have the cash flow of the new property be able to pay all its expenses, mortgage, AND the line of credit back.

With the economy of scale in multifamily, each additional unit nets you a little more than the last, as a rule of thumb.

If not, consider establishing one for 2025, after learning the rules.

The 1% rule is an old metric.