Need software tool to carry note, preferably online (SaaS)

[Matthew Adams]

We might sell a rental house to the tenants and carry the note.  The house currently has a first mortgage held by us (about $88k).  We're in Mississippi.

First, will we have to pay off the first mortgage in order to offer them owner financing?  We've heard of a wraparound loan & a "junior" lien.

Second, I know I can do it via a spreadsheet, but I want the convenience of an online, software-as-a-service (SaaS) tool that takes care of everything, from payments to legal reporting (1098s and such), etc.  Also, I'd rather the buyers pay a faceless mortgage-looking company than me personally.

This is our first owner finance, so need something simple and inexpensive.  Thanks in advance.