We also setup a joint business account for our LLC that all credits/debits for the property go through.

You probably need to go commercial but even that you likely need a higher downpayment.. if you thinking 20% down  that's likely not gonna happen     you can try and joint venture with someone with higher income to use there leverage

The cash flow and appreciation you could potentially gain can enable you to not entirely rely on Roth IRA withdrawals and social security for retirement income.As long as you do not exceed the income thresholds from the IRS (currently $206,000 for those who are married and file jointly), you can make Roth IRA contributions to help generate tax-free income at any age.

Use a joint bank account, you have withdrawal the borrower has deposit authority, the bank deposits will be the record of payment.

I would also be interested in possible joint ventures or reduced fee for equity.

When the local authorities decide to repave those lanes and alleys using modern machinery, the weight of the machines can cause the ground to settle and your branch line can crack or separate at a joint.

A common method of doing this would be to create a Joint Venture Agreement.

My number one piece of advice is Joint venture your entity with your partners entity.

Please require lien releases from vendors of sub provided materials, If they can't provide money to pay vendors then joint check them or ask for invoices and break up the payment labor/materials.

Unless the seller was willing to a joint venture (seller financing of some sort), you need a lender to be happy with the deal.