My Savings Certificate (Sanchaypatra) was from Gulshan Post office, Dhaka. I had liquidated it into cash and deposited into my bank account when I applied for Nomination from Ontario. As a source of this cash, I had submitted a translated and notarized copy of the Sanchaypatra. I am not sure if you need to go through the same trouble for e-Apr but Ontario was very strict on source of funds.
I had good experience at Dr. Wahab, but I would suggest to be their at 8am in the morning to avoid being in the queue for a long time. It takes about an hour or so to complete the exam and collect the paper. You will not receive the result of the test. Dr. Wahab will upload it directly to IRCC. All you have to is upload the paper that you will get from there as your medical examination document. Typically, your profile will be updated with your medical examination status (pass/fail) within 2 weeks or so (sometimes it takes longer).