Can you do contracting work on properties and learn valuable skills that will help you remodel properties, flip them, or otherwise learn as much as possible about the construction trade? 

(replacing the original HELOC debt) However whether the interest for the  additional $200kish of loan  will be deductible will depend on 2 things: -How were the renovations paid for?

Quote from @Eric Huntermark: Additionally, as I'm thinking about conventional loan products as well.

Here's some input to help guide the decision between selling or renting the property, considering the specifics of the property and the potential additions like the ADU (Accessory Dwelling Unit):1.

Additionally, interest-bearing accounts may be mandated in certain jurisdictions, so it's important to check local regulations to ensure you're handling deposits correctly.

In addition, some states have different regulations tooI'm sure that someone that specializes in Insurance can give more insight into what is and isnt necessary or best for our properties.

Get the property in your name, make sure that the seller is an additional insured.

When evaluating a property management company, it's important to look beyond just the management fee and consider the full scope of services and costs involved.For example, at our company, we charge a 10% monthly management fee, a $250 lease renewal fee (unless it’s a takeover tenant, which requires additional effort to establish a strong relationship - because usually people are changing pm companies for a reason), and the first month’s rent as a leasing fee.

Additionally, it's easy for a house on one lease to get absolutely trashed by the renter.

Most of the time, an ADU will cost 100k just for that part and then you have to actually build the cosmetic part for an additional 40-50k.