I will second what others have written:
If you think the cost of hand made shmurah matzah is too high, start your own matzah bakery and undercut their prices.
Or get the machine made shmurah matzah for the seders and eat Streit’s for the rest of Pesach.
And if your rav is so insensitive to your economic situation that he requires handmade matzah for the entirety of Pesach, get a new rav. Take on a different chumrah that isn’t so bloody costly.