I Miss 4 Back Upper Teeth On One Side On

I miss 4 back upper teeth on one side On this side there are 2 front implants. Some denturists say it is impossible to have Valplast flexible removable denture when only on one side teeth are missing , others say I it is Ok.All agree implants would be better . I am 69 and have Parkinson's since the age of 60 but I don't have tremor in the hand ,I take levodopa.
Implants are. Ery expensive and it is a long procedure. With removable dentures besides other disadvantages I am afraid I won't be able to take them off and put them on...
Thank you,
Julia