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I use XOOPS in several commercial sites of the campany i work for.
Xoops is free and amazing!!
But if you want to create something really new, you have 2 choices:
1 - Learn to use PHP programing, studie, read, studie, and read more. After you have done something, you can share it and if it is samoane else interest, you may togeder start sharing ideas and code... Thats the way i beleave correct, the way i use, and the way it works for me.
2 - If you are looking for one servent to "guive structure" to your ideas, you do like everybody does... You pay. Do you think the community should work for you? First work for the community.
If you think the price someone guive you is too hi, start reading, learning, sharing, receiving and using others samples, modules parts, ideas,...
Good work for you!!
(And sorry my english..)