Accepting the proposal of a boy who sells CCTV and DJ equipment

Q: A man proposes for a woman, and both are satisfied with the proposal. He has a business where he sells equipment as a living, primarily CCTV camera systems. He has also sold DJ equipment (exact details are not known) on 2 occasions. My questions are as follows:

1. Is the selling of CCTV camera systems permissible?

2. Is the selling of DJ equipment permissible?

3. Is his income halal, and would it be permissible for the woman to go ahead and accept his proposal?

Abortion

Q: My gynecologist told my husband and I after the birth of our daughter that, if I should fall pregnant again me or the baby will die. My last born was a twin but I lost the one baby. There was complications with me in theatre because they could not control my bleeding and I could not have a baby for the past 7 months. Thats why I am asking if I can have an abortion if I fall pregnant again.

Is it permissible to perform Esha salaah in a house where one will be performing taraweeh?

Q: I have been offered by my uncle to perform taraweeh salaah with two cousins of mine at his house. His house is between a musjid and a jamaat khana and is 650m from both. I wanted to find out if we are performing taraweeh there, can we perform the esha salaah there as well or not?