Is there any way to reduce monthly costs to ensure long term viability if we are going the donation route?

I'm planning on shifting my local business website to a VPS server in 2017, if sharing a VPS helps.

Do we need proxy registration?
I used it for a few years after which I just let it expire.
I replaced it with my secondary (cough) address details/contact number/mail details and I haven't seen any increase in spam nor have I gotten any notice from icann. (The mail id is valid which I check every few weeks).

Should we get google adwords on SAH?
Not sure how effective that will be, considering our monthly hits. We could get a few months of hosting out of that, I reckon.