Howdy & welcome from Texas.
I don't know anything about long arm quilting machines but I did find a facebook page that apparently deals with Homesteaders. Someone asked about a manual & they replied back that they could email it to that person. That was back in March, 2020 but I would give them a try for a manual. The last activity I saw on it was Jan. 2021
https://www.facebook.com/quiltingsolution/