First things first roll management, depending on what games you want to play you want to have X amount of buyins readily available for you depending on the potential swings of the game type you choose, see examples below.
Single Table Sit and Goes;
Generally nine player sit and goes are the lowest volitile game format where you can scope out the easiest opponents therefore between fifty and one hundred buyins for the limit you wish to play should be sufficient. Top four players get paid in these so you can find yourself cashing in these more than any other variant.
Six max sit and goes are a low volitile game format with a payout structure where the top two get paid. This format is slightly more volitile than the nine max sit and goes but there are less players to get through and is a faster paced game with more action available. I would recommend a slightly higher amount of buyins for this format onwards of seventy five buyins.
There are also “Double or Nothing” Sit and Goes which in my opinion are very likely to be the lowest volitile of the lot. In this format you can play six max or ten max and the top half of the field wins two buyins back in return for their investment. I would recommend fifty buyins for this format.
Now this is a more complex area and generally I would go by the rule of thumb that the less average amount of runners in any said tournament you want to play the lower volitile the swings will be playing it, and on the other end of the spectrum the more runners in a tournament field the higher expected volitilty to be had.
Do you want to play a tournament where the buy-in is out of reach for your current bankroll based on how many buyins you have available? This is the game type for you! The amount of buyins you should have available for the buyin range of the satellite should come down to how many tickets/tokens are available in the prizepool guarantee. The more tickets/tokens available the lower the volility of said satellite.
What is this volility I hear you speak of? Well basically just like any investment you make in life, poker or business, there is a risk reward factor, and the lower the risk the better because swings happen and the higher the risk/volitility the longer a downswing can happen or on the other side the more plentiful the upswing can be rewarding.