If you have an LLC, ownership percentages are recorded and thus difficult and/or costly to change if an active partner is earning equity through actions.To give some personal experience, Lending and banking can be difficult at best, impossible at worst with a Land Trust.  

Can someone recommend any advice on anything (setting up partnership structure, accounting/ setting up a bank account , lending with foreign investors, sourcing deals etc…).

You actually end up making the tenants utility bill go down while you pay what the difference is had there not been panels; to a bank.

These loans often have more straightforward qualification requirements for investors with multiple properties but may have slightly higher rates.Cash-Out Refinance on Your Single-Family Rentals: If each has around $70k in equity, a cash-out refinance could provide some capital for the down payment, renovation costs, or even help you buy the 4-plex outright.FHA 203(k) or Conventional rehab loan: If you’re planning to occupy one of the units as a primary, FHA’s 203(k) loan or a conventional renovation loan could help with purchase and rehab costs at lower interest ratesPortfolio Loan: Some local banks may offer portfolio loans for investors with multiple properties.

Banks ask for larger down payments to shift risk to the buyer/borrower in default. 

My assumption is that when negotiating the purchase of the property I would have to pay off the mortgage, or would I be able to Pay off the taxes and maybe provide the current owner with some cash and then work with the bank on the mortgage?

Did you use a local bank/credit union or a private lender?

Except the bank, they loose, because now your partners and you are getting what $ they would have sucked out of it. 

It will be helpful if you get that lease resigned before approaching the bank.  

What I hear again and again from hosts who are accustomed to Airbnb for their STRs and even some MTRs is that they expect FF to work the same way when, in reality, FF is just a lead generation platform.