We bought our first boat last year - and we had about an hour and half drive up, so we would book a fri or sat night cheep stopover in a travelodge or prem inn in Norwich or wherever looked good, which gave you good time to travel all around the boat yards, marinas and sellers looking. We really did learn a lot doing this seeing different boats and speaking to people and i would recomend doing it that way! It seemed that nearly all the boats advertised were disapointing in one way or another, but travelling round you could spot something with a for sale sigh on it quite often! We saw one boat that became our benchmark, which was double our budget , but we kept going back to it and ended up buying it in the end - well pleased with it now and armed wit what we learned on the way got it at a better price!
We also looked at moorings while on our travels, and ended up under Wroxham bridge in bridge house broad, short walk to shops and pub - may be space there!