I have the Brother Innovis 4000D upgraded to the Duetta, Brother 8200, Brother 7500 and Pfaff 7570. I use all of them all the time. During the holidays I sometimes have all of them going making Christmas gifts for everyone. I also have 16 grandchildren, 9 of them girls, that I do embroidery for. I embroider their jeans add, hotset crystals, make them totes, purses, etc. I personally get a lot of use of out mine. We have custody of an 11 year old granddaughter. At Chrismtas I make 18 gifts for all her teachers at school.
I too am 65 and find tons of things to do on my machines.
Why don't you look for a used machine on the sew it's for sale group. Or, if intersted I can email you the name of a dealer in Ky. that always has some great deals on used machines, not to mention, no tax for out of state sales. He's the dealer I buy all my machines from. I just bought the machine upgrade from him.