Hi
Firstly, it's great that you want to help people. It's also great that you have a business that is doing well from a financial point.
I am not a tax expert, but you would need to check the tax implications of funding one business from the profits of another. I do believe that this is possible, but a feasible tax structure would need to be setup. Regardless, I would NOT use profits from one business to fund the other, but rather think of a business model (+ grants, donations ect.) as a means of funding.
As for grants and social services:
Social services: from my knowledge, if you mean the official government social services, then they don't have much of a budget. As for grants: you most definitely can apply. Just take into account that it takes a lot of time, and they often require you to be a registered entity (non-profits of sorts).

I am a mentor on Startups.com, an international lecturer on entrepreneurship and negotiation, and a commercial startup lawyer. I've successfully helped over 400 entrepreneurs, startups and businesses and I would be happy to help you. When scheduling a call, please send me some background information and the 2 main questions you want answered so that I can prepare in advance (to give you maximum value for your money). My reviews: https://clarity.fm/assafben-david
Good luck