Wordpress is the perfect platform to build a mini site...
Most hosting companies even offer a one-click installation option.
i do it all myself, i use studio press dot com themes, many have landing pages as standard but they are very simple to get up and going quickly as a min site as well.
i then buy a hosting plan, i use host gator dot com and can host hundreds of domains on 1 plan so its very cost effective and they offer fantastico for the initial wordpress setup so its really easy
once i do a "master mini site" i use backup buddy to duplicate the sites and then simply change titles and a little content to cover google issues.
so given my system the cost is:
$250 HG, $250 SP, $200 BB but i can get hundreds of domains online thus making the cost very low per domain.
YES, then you need to add your time, so i have put a price on it and its $60USD per domain, but what this gives you is total control.
tim
PS: i don't want work, i am just telling you what i do.