A lot of new investors are looking at numbers from 5+ years ago and wishing they started investing then.No one has a time machine, so you just need to look forward.Why can't you find a beat up property on the market for 90+ days or offmarket and buy it owner-occupied for best terms.

Do they offer an owner portal?

Owner financed with 10% down, and 3% interest with a 5 year balloon.

Nice Day everyone, so I’ve been learning house hacking & Have A Great Question , Are You Able To Take On Market Rental Properties That Are Listed As Rentals not listed as being bought As-Is ,Under Agent Or Owners & House Hack Those In the same Way ? 

PAYMENT DISBURSEMENTS - Incoming rents would come into a general rent account, replenish the maintenance fund for any expenses incurred through the month, take the PM fee, and then disburse the rest into the owners account.

I have been amazed by how much community owners will ask for parks that are posted for sale.We had a community for sale in Orem Utah, about 200 spaces asking $40,000,000.It is not unusual to see Parks that are right in the middle of the city asking $100,000 per space but that would mean CAP rates are down to the sub 5's.

Not to mention the  emotional toll it takes on a property owner and the aftermath of finally getting your property back then perform expensive repairs.  

3- To record incomes and expenses correctly for tax issues, do we need to make an official contract for the renovation (between the LLC and one of the owners), or is simply issuing invoices and receiving payments in the LLC’s bank account enough?

Neither tenant or their invitees shall be a nuisance or act in any matter that would interfere with the quiet enjoyment of adjacent tenants or property owners. 

Have airtight agreements that protect both you and the owner/landlord.