If the property goes unrented or is rented but the tenant doesn't pay can you cover the mortgage, eviction cost, renovation cost and holding cost during that process and pay your bills?

What you cannot do is use the funds that the C Buyer brings to escrow and pass those funds through escrow and use those funds to pay off the A Seller. 

Many of these platforms also send the same leads to multiple agents.Since most of these paid leads require work/follow-up anyway, have you thought about paying less $ for leads where there is significantly less competition?

If you're not careful you can easily end up paying $200/mo in subscriptions without even realizing it (this has been the case with my partner and I, between video game stuff and music and entertainment, etc. etc...).

I have no credit debt and $12,000 of student loan debt I'm looking to pay off within the year.

If your mortgage is $2,500 then probably $500 of that is going towards paying down your  mortgage< so that’s another $500 profit.

If the properties are split into an LLC, then each LLC will need its own accounts.Checking: collect all income here, then use it to pay bills.

We are hoping to retire to this home in 2-10 years and figured we'd buy why rates are cheap and let someone else pay the mortgage for awhile.

No one wants to turn in pay stubs, taxes, etc. if they can avoid it.

It's not unusual to have tenants paying $800 pm what would be a $2000 plus market rate unit.TOPA in any of the jurisdictions that have it doesn't really concern me.