There is no need for one to invest on whatever will be a burden on him, because an investment should be something that is tension free and burden free since you are on a long term ride. The lesser the burden on you when you are DCAing regularly, the higher chance that you have to invest in a long term to achieve your goal.
It is good when an investor on a long term bitcoin accumulation journey is sound in financial management, this will help him a lot to be flexible with his bitcoin accumulation in various stages of bitcoin price and he will continue to accumulate more bitcoin with regular DCA irrespective of bitcoin price without a problem, because he has a target that he wants to meet up in maybe 4-10yrs time. This is because he has made the available resources to take care of every expenses that may disrupt his bitcoin accumulation journey.
Tension is natural but you must be able to control it, if one does not engage in investment then it will not add any wealth and keeping money in fiat is not an investment but will continue to be depleted by inflation every year.
Well... All of that must be carefully planned and with an increase from other sources of income because this is important to increase your investment to grow the investment portfolio, any other funds then it must be prepared and manage it well if you are able to do so then the investment journey with DCA accumulation will not be too complicated because you yourself have managed it well.
What to do: Never leave work because every time the monthly salary will be your needs, look for other income of course this will increase your aggression towards bitcoin so that investment continues to grow, manage funds as well as possible, reserve funds must be ready at least 3-6 months to cover it.