Hi Mishw,
I sympathise with your situation, - it's very tricky with 2 little ones!
Party plan can work to give you some extra money each month (or even be a complete career change if you want it enough!) - and like anniebear says you get out what you out in , so you do need to have clear goals for yourself and be clear what you need to do to earn x amount(if that's what you need)
ie to earn £400 profit each mont I need to be doing x amount of parties , or x amount of sales ) Your sponsor into any party plan company should help you work this out and give you the support to help you achieve it, but you will need to be comitted to doign it for yourself as it;s all too easy to give up at the first hurdle.
for me , it took 6 months to a year to get regular bookings and build up a good customer base.
If the business is also network marketing (or MLM) then you also have the option to build, support and motivate a team and you can earn (potentially very good!) bonusses on their sales, which makes it seem more like a 'business' .
First and foremost, find one with products you are passionate about and speak to the person who is recruiting you to make sure that you can work together . Personally i think that your relationship with your sponsor can make all the difference in teh early days.
I do Mini-IQ, so am happy to fill in detail on this if you want. Yes, I earn good money some months and less in others - but that is mainly because I choose to have a quiet month (or can't quite be motivated to drum up some business!)
hope this helps, Linda