Hey @Jordan Petty,
1-That's a tough one, it will likely come with experience. To learn, you could go shadow another wholesaler to try and learn. You could also make friends with contractors.
2-Don't make an offer on the phone, try to get an appointment to see the house and meet the seller. You need to meet the seller to build rapport.
3-Trec is fine, some people use a two pager contract as it looks less threatening than the long Trec contract. Some people have both and offer the option to the seller.
4-Your reputation is on the line, if you say you will close by a certain date and you do not, well you're giving a bad rep to all investors and that's why wholesalers have such a bad reputation in general.
5-You cannot say that you are buying their house, you are just putting it under contract and assigning the contract to another investor for a fee.
6-You can arrange the closing so that the seller and the buyer come at different times, your title company will help arrange that. Another way is to do a double close which are less common I believe.
Hope this helps!
I would like to know more about the BP houston group HIT, do you guys meet every so often? I would be interested.