captains claws is really not good right now in standard. I would say take out 2 of them for more creatures. mono color decks are struggling in standard right now and when you try to build a budget mono deck, i hate to be toxic, but you will be destroyed. im currently playing mono white but it is not a budget deck. If you really need to stick to a budget your best bet would be to do an
aethergeode miner,
solemn recruit, and
key to the city combo. i have this combo in my deck but its more as a distraction for removal while my gisela and gideon attack. the combo i think is very underrated it can be very powerful and unexpected by your opponent so it might work for you. basically you just want to blink the
aethergeode miner to buff the
solemn recruit then use
key to the city to swing in for massive damage. Definitely put in some
stasis snares and if you can afford them
declaration in stone.
Thalia, Heretic Cathar is also really good and pretty cheap price wise. Hope any of this helped!