I'm married with two kids from a previous marriage.
Congratulations on your decision to have another baby. My DH(means Dear Husband or Darn Husband) not sure if you knew the acronyms. We are having our third baby and we got pg last month. I am usually very fertile so it doesn't take much for us to get pg. But this time I wanted to do it closer to "O" since we were trying for a boy this time. Anyway we used the CBEFM(Clearblue Easy Fertility Monitor) and it worked that first cycle. I am not sure how much it cost to get donor sperm but the monitor is about $200 and then the test are $50, but you can get the monitor on Ebay for like $50 like I did and buy the tests and that may be cheaper than going back for donor sperm (if there is a cost associated with it I don't know). I loved the monitor and the best thing is when you are done you can sell it. It is worth a try or getting the Ovulation Predictor Kits. I used that as well. GL and I hope you get pg on the first try. BTW I think it is great that you and your husband are going this route. It is all about the journey together and the love you have for all of your kids.
Thanks for replying.
The monitor is great. You set it on the first day of your AF (Aunt Flo). Then you turn it on at the same time everyday and once you are close to when it needs you to test it will ask you to take a test. Then it will show you your high fertility days and then peak fertility. The morning I got my peak fertility reading