I think both offer good areas long term for both rentals and appreciation. I've seen the rents in 78745 go for around $1,400 a month and just go up from there.
There are a lot of investors like yourself purchasing older homes in 78745 and Windsor Park and remodeling them. When the remodeled homes are sold, they are sold for a tidy profit.
If you would like some help with a rental home, I would be happy to help you. I have very good relationships with reputable property management firms and know a lot about rental homes.