For now, have them both pay you rent however they'd like to, be it together or separately as long as they follow your payment instructions on your lease. 

Unfortunately, I never take pictures of the toilets, just instruct them to be removed ASAP. 

If not, DON'T RENT TO THEM, they do not follow instructions. 26.

@Michael Plante Check with the mobile home dealerships in the area as well as your local manufactured housing association.

The one that had tanks, we just instructed the tenant how to operate them. 

Instruct the tenant to stay out of the water until emergency services can visit the house and ensure the power is off in the flooded areas. 

That's a play there, but land is so expensive now that unless you buy it years in advance, your upside potential is going to be limited.You might have some luck with manufactured park development as there's a growing need for that product, yet it's not sexy and so no one focuses on it.

Mine take zero seconds per booking the bookings just come in and I send an automated thank you/instructions 

You should seriously consider joining the Texas Manufactured Housing Association for many reasons, not the least of which they have the forms you need.

Your local manufactured housing association as well as the local government entity in charge of titling mobile homes are both good resources to start.