Your problem is that many of the links you'll build will be exact match text links, which G has declared war on. The downside is even worse when G finds affiliate links.
I think people are struggling with this type of site.
What I'd suggest from experience is building ONE large site, under a brandable name and focussing on user reviews. Only drip feed in affiliate links later - even better a booking engine style like tripadvisor.
But yes I think exact match .org.uk names are very hard to rank now, especially with no unique content and packed with affiliate links.