My take on these three questions is a little different from what has been posted thus far.
When I itemized my income tax deductions, I had no problem with getting a receipt from the church and listing those contributions. While it isn’t totally private, it isn’t (or shouldn’t be) public, either. The only ones who should know are those who have access to the books at the church, the IRS, me, and God. I consider taxes an obligation (render unto Caesar), Caesar sets the rules, and I follow them. That leaves more money for other charitable donations. In my opinion, there’s nothing wrong with getting a receipt or statement and taking such a deduction as long as it’s not done to get praise from our fellow man.
Evictions and the like should be handled on a case by case basis, as you have apparently been doing, and I admire you for your conviction in trying to live God’s word.
As for the beggar, I usually offer a meal rather than cash, if that’s what the person says he needs money for. In retirement, I have very limited resources and believe that God calls me to be a good steward of what He has given me. That does not include giving money to an alcoholic to buy a bottle of cheap wine, but does include feeding the hungry. If I can’t do both, then I have to choose.
Our St. Vincent de Paul Society conducts in-home interviews before donating groceries, paying electric bills, etc., to those who have requested help. If the trash can or refrigerator is full of empty or full beer cans, the request is usually denied, again trying to be good stewards of the funds others have donated.
I once “rented” two rooms and a bath in my home to a homeless woman and her 12 year old daughter. She turned out to be a drug addict, never paid me a cent, wrecked my car, and would stay gone for days at the time, leaving me to get her daughter to school and otherwise take care of her. The final straw was when I discovered she had been using drugs in my home and I had little choice but to kick them out.
That experience cost me about $10 grand, but I was responsible only for my actions, not hers. She could have been Jesus in disguise (whatever you do for the least of these…) and the money was a small price to pay compared to what the price may have been on judgement day if I had denied her when I had the ability to help. It was perhaps a foolish choice on my part, but I have never regretted trying to help her, although if the opportunity ever presents itself again, I will try to be more discerning.