Hi,
I have some domains that I want to develope.I have some ideas for what kind of website I want but need your advice and suggesstions.The domains are:

BillingAccounting ,com
ClinicalFindings ,com
PersonalTaxShelters ,com
InterestingDownloads ,com
PracticeMaths ,com
GetRidFast ,com

Now my immediate focus is to develope ClinicalFindings ,com.The idea is to make a medical wiki like webhealth-com but after enough members and traffic I want to make earning through ads so is mediawiki good choice for this or should i go for other wiki softwares?can you suggest some ?
Also if i want to make forum on this site then can i use wiki script and forum solution like phpbb at the same domain or not? like mediawiki at main page and phpbb at only ClinicalFindings ,com/forums ?Also what would be better, a wiki solution or forum based solution keeping in mind the ads and earning aspect?Sorry for lots of questions .
TIA

P.S: Do provide ideas for other domains as well.