Buy a little bit of bitcoin every week don't care if it's a $1, $5, $10, $100, figure out what you can afford every week and buy it, get rid of unnecessary expenses or whatever you can think of getting rid of and spend it on bitcoin
5 to 10 years if you buy some every week you will be a multi millionaire
There's no other effective way to accumulate bitcoin than to follow DCA, otherwise you will complain all the time about the highly cost of bitcoin. However, by doing DCA, you can extend your bitcoin hodling with how many years you are comfortable of hodling, just continue to be patient and positive on any of your investment, it will really give you a successful outcome.