Erratic engine starting

We purchased a new van on December 22 of 2015 from Baxter Chrysler, Dodge, and Jeep here in Lincoln with the intention of having it modified to be handicapped accessible by Heartland Mobility of Omaha. We got the modified vehicle back on February 18 of 2016. Since then, the engine has refused to start erratically. It might start fine in the morning, so we drive it to one of my doctor's appointments and then it fails to start when we want to go home. And , when that happens, it might start with the remote starter instead of the key or neither might work. We used up all of our AAA towing benefits last year. Beginning on January 9th of 2017, we have taken it both to the Baxter service center and to Heartland Mobility to be repaired and neither of them have been able to fix it. For some reason, during the last two months, my wife has been going out to the garage and starting the engine every day. I cannot explain why, but it has started every day during this time. Our vehicle has less than 3,000 miles on its odometer.

When it was modified to be accessible, that work was done by Braunability They do a tremendous amount of work on the vehicle during that process.

Any ideas?

Thanks!