Hey bumtzibumtzi,
and welcome to the tournament strategy board.
I would be happy to see you around as a regular poster in the future. I am always willing to help you out if you have any questions regarding tournaments.
First of all I would recommend playing lower stakes. For the 3,3$ 90 men turbo KO's on Fulltiltpoker I would recommend a bankroll of at least 660$. The more the better. The variance is way to high to play them with less then 100 Buyins. For normal MTT's with a much higher number of players I would recommend at least 350 average Buyins.
Having 260$ I would recommend playing the 2.25$ 27men turbo's as well as tournaments with a maximum of 1$ Buyin.
You should always try to focus on sample size. The more you play the more you win. That being said, I would recommend multitabling up to the maximum that you can manage without making too many mistakes. Your ROI might decrease, but at the same time your hourly (money earned per hour) will increase significantly.
Downswings of 100 or even 200 buyins are nothing special and you will encounter these from time to time. Therefore you should be able to buffer them with a conservative BRM. The more you play the faster you will get out of a downswing.
If you have any further questions feel free to ask!
Regards,
Asaban