The warranty company takes its time accessing the situation, and then they tell you there is a deductible; they will only cover so much; you need to use their preferred company, and it will take three weeks.

Alternatively, a tenant-in-common (TIC) structure is often preferred by investors in similar situations.

My personal preference for a buy and hold would be an already established area (or an area that's still gentrifying, but has already seen significant progress). 

Consider offering equity partnerships, debt financing with profit sharing, or preferred equity, where investors get a fixed return before you share profits.

My current APR is 3.375%.I could get ~$1,400 - $1,900 in rent and that's conservative and my current mortgage is ~$1,100.The property could appraise for ~$225,000 and the outstanding principal is ~$178,000.I honestly would prefer to move if the new property had more sqft.

What I want is a way to have and trade the stocks and bonds I currently own at a large brokerage in an IRA (as well as ETFs preferably), but held (without paying extra foreign tax) offshore.

We need to find a good app/website for them to send rent as well, preferably one that has many things built into it, making it more simple to manage things in one place.

Or if they would prefer a lease option? 

Maintenance and potential repairs will also require a long-term financial plan and setting aside a contingency fund for such expenses.The steady cash flow, appreciation over time, and tax benefits can make a meaningful difference to your wealth in the long term, especially with the principal paydown on the mortgage.However, if managing the property from a distance feels too burdensome, or if you’d prefer the certainty and flexibility that comes with having less debt (especially given the high mortgage rates), selling and using the $100,000 in equity to reduce your loan for your next home may be the smarter move.

As far as benefit to the seller goes, @Matthew Paul I think you are probably right on the money and regardless of whether they would have preferred to stay in this house rather than move, it is likely providing them some excellent cash flow; and I'd be hard-pressed to come up with a deal that serves both parties better than the current situation.