The tenants have expressed that they want to buy the property because their family is already moved in and comfortable there.

Maybe even two zeroes lol.Regarding the mortgage, I've been working with a local credit union in that area and so far they haven't expressed any concern about the low amount.

Just talk with your agent and express concerns and see what they can do for you!

@Greg Scott So I'm trained in Express Offers, which is eXp Realty's iBuyer platform. 

My renting friend invited me over several times and expressed almost every time that he wasn't happy with the place and was wanting to find a house that needed less attention and maybe turn it into a multi-family scenario. 

( That can include large unexpected repairs, for example, like finding out you’ll need a new HVAC system or a new roof, which can cost upwards of $500k plus).In addition, some of the investors who expressed an interest will end up backing out, and having an excess or reserve will help fill in the amount you lost.

I found this site called "Bird Dog Express."

The worry is that the tenants have expressed really wanting to stay in the home.

As @Sarita Scherpereel expressed, I too am biased as I have previously lived there for a number of years and loved it!

Real Estate Express pops up a lot when I am doing research for schools but they seem to have some serious mixed-bag reviews from both people the best solution ever to outdated and poorly written.