Just to add my 2p worth.
It is possible to combine some of these things.
Ie keep the boat at home on a trailer and practise launching with a crew when you have one for fishing trips, this gives you the chance to launch in a variety of places subject to weather and fishing species targeted
Ie Poole, Lymington , Weymouth.
When you are short crewed or with Family, maybe launch at better facilities but combine the fee with some time in their Marina.
Cobbs Quay, Portland, Weymouth.
We have several Members here that bring boats in on Friday, launch, pay two nights berthing and take the boat home on Sunday.
While this is not always available to Non Members, When its quiet and we have space it can be.
You get a walk on facility for the missus and kids at a fraction of the cost of annual.
I am sure other marinas would offer simular deals
Charlie