That is not even the same topic, since one question is getting started right away in terms of investing into bitcoin, and then another part would be whether adjustments might be chosen to be taken in regards to buying bitcoin somewhere down the line based on the size of the BTC stash that had been accumulated over the passage of time.
Now, you seem to be changing to some other topic that relates to adjustments to the purchasing times of bitcoin being made based on cashflows and budgeting kinds of considerations like that, which seems to be a different topic from what I had been attempting to describe in terms of getting in, getting started and then reassessing down the road.
Maybe along that same line of the initial considerations, there can be a status of poorness in which someone might be having difficulties figuring out how much discretionary income that he has in order to invest into bitcoin in the first place, so he might want to make sure that he gets through the whole month before buying bitcoin with whatever is extra at the end of the period (so then his new paycheck comes in and he buys bitcoin with whatever was left from the earlier check), but at the same time, if the guy is getting into bitcoin, then it might be more likely that he would also need to figure out his cashflows and his expenses, so even if he might have more difficulties in regards to figuring out his discretionary income levels in the first month or two, he might be able to put systems into place in which he is able to buy every week, even if he gets paid monthly, but he might have to makes sure that he builds up enough of a reserve (and emergency fund) while he is potentially becoming more regular with his BTC buys the might end up being every week.. but yeah, if he is not sure about his cashflows, the solution might be to spread out his buys over longer periods.. yet I tend to be a pretty BIG fan of attempting to get yourself into a situation where you are able to buy bitcoin every week, but yeah, you cannot employ those kinds of practices if you are not even sure if whatever money you have is going to get you through the month (or until your next paycheck)..
I like the point of buying every week but since fingers are not equal, each investors has it own expenses although it could be reduce to archieve the goal of buying every week. Nevertheless, the inflows still matters (either salary or wages) so if the weekly cannot be achived doubling it should be pretty much easier to cope with.