Communicate with the patient, that the denture is a must and the implant-retention is an option. Then try and carefully fabricate a good denture first, bearing in mind to integrate implant retention later if the patient is not satisfied.
I always use the neutral zone technique, it is the first option, the main problem in lower dentures is instability, and neutral zone overcomes it. Then, as dr. Deppe says, it is possible to integrate implant retention later, if the patient wants it.
Yes, it really helps, most of my patients are edentulous elderly and the neutral zone is a great option to treat them. My technician use normally plaster indexes, but polly vinyl siloxane is a very good alternative.
Even though the Neutral Zone technique can come over the stability problem of the lower denture I do prefer implant-supported overdenture. However, sometimes the patient can't afford the latter option so the former one may be the last resort.
id go for neutral zone ,because it stabilizes the lower denture and places the teeth in the appropriate denture space,which is also a requirement for implant retained prosthesis. so neutral zone is a win-win solution in either scenarios