I see the idea of building up funds first before accumulating bitcoin as a plan that will delay our bitcoin accumulation journey. Instead of trying to build up funds before accumulating bitcoin, you can use the DCA strategy to accumulate bitcoin either weekly or monthly, whenever your money is readily available. There's no pressure to invest in bitcoin; no one is forcing you to do so. The only thing that can make you sell your bitcoin when it's not time for you to sell it is when you use your whole money to invest in bitcoin. You will depend on your bitcoin investment to survive because you used all your money to invest in bitcoin.
Why try to build up funds before investing when the dollar keeps falling occasionally. The DCA method is very simple and straight forward. Just invest your budget plan the very minute your income comes in, and you will have a reason to smile in the future. Just as you've said, there is literally no pressure in doing this since it's a personal decision to choose a certain amount that can be invested on a regular basis. This whole idea should be backed up with consistency and patience, as it's the only way to enjoy a DCA form of investment. There shouldn't be any pressure to sell either when you've made a proper plans to set aside the amount you are okay with. Assuming you earn $100, and choose to set $20 for your DCA approach, you shouldn't be tempted in anyway to touch your investment in years to come.