heating oil tanks are NOT regulated by EPA. you have to look at your state cleanup standards. 20,000 ppm is significant but the good news is that heating oil tends to be very viscous (unless you were using no. 2 oil) so it may not migrate very far. the cost dramatically increases if you have groundwater contamination and the groundwater is used for drinking water. you need to engage a environmental consultant, not a tank contractor.

Although @Guifre Mora presented some common situations there are a number of lenders for which 12 months is standard and extensions can go several months without penalties and there are no prepayment penalties so it really depends on what matters most to you. 

The facility is in NC. 152 units

My main concern is how to find someone to be the boots on the ground at the facility if I am a few states away and managing remote.

They already made it clear they don't want your input or opinion.... you are just there to do the paperwork for them....When it doesn't sell due to be being overpriced, they will blame you..... they will reject offers and it will be like pulling teeth to get them to lower the price and they will be pissed if you convince them to do itKind of stalking you on social media etc..... pretty standard nowadays.

All else aside, given the amount of rent you could be charging it may be an idea to sit down and develop a long-term (2-4 year) budgetary plan for the unit/complex so that you can 1)gradually increase rents to a more uniform standard--as one member stated, "if they are all comparable units, there shouldn't be a drastic difference in the rent amounts" 2)eventually get all the units with equivalent or comparable upgrades (to keep things even with the neighborhood comps based on ammenities), and 3)ease your mind about the financial plan and trajectory of your complex (so you can just follow a predetermined plan and adjust when needed as time progresses).

Hello, I'm looking at investing in Assisted Living Facilities.

Then using the excess $2M to pay back shareholders while the property was spinning up.3) Am not crazy about interest-only loans since a good way to build equity (in case price appreciation doesn't meet your standards) is debt reduction.4) Some leased buildings were really sold on pretty shaky leases and neglecting the $/SqFt. 

With that said, there are a few books out there that will help acclimate you to Note investing.Win-win revolution Paper profitsBulletproof title due diligence (very “nuts & bolts” read)Just like rental properties or fix and flips, there is some standard note buying rules to be aware of and @dan Deppin has put together some content on this area.

Not sure if I should go for a standard SFR, multi-family setup, or go for something bigger, like buying an apartment complex.