^--- Yes and No
Yes, you can just dump 12K on your SA and just let it sit there, replenish it once it went below the minimum maintaining balance. Your EIP will just get 1k from that account each month.
No, since you can also have only 2k on your SA account. Your EIP can still get 1K from that account every month. You'll just have to deposit some more on your SA so that EIP can get the 1K from it.
Let say, nag-open ka ng SA sa BDO for only 5K today. Simultaneously, you also opened an EIP for a BDO Equity Fund that would debit your SA every 5th day of the month. Since tapos na ang May 5, at meron pa naman 10days before June 5. (10days is the minimum number of days to start the EIP auto-debit based on the date you chose and the date you execute the request) May 16 pa lang ngayon, kaya meron pang exactly 10days before June 5.
Pagdating ng June 5, EIP will automatically withdraw 1K from your SA and use it to buy an Equity Fund.
Kaya on June 5, your SA will have a balance of 4K, while you have an Equity Fund worth 1k (equivalent sa kung ilang shares ang kayang bilhin ng 1k na iyon sa price ng Fund sa araw na bumili)
Next month, July 5, your SA will have a balance of 3K, and your Equity Fund will now have x amount of shares.
Let say maintaining balance ng SA mo ay 2K. By July 5, 3K na lang ang laman. Nagkaroon ka ng 2k and you deposit it to your SA. So, magiging 5K na ulit ang balance ng SA mo.
Next month, Aug 5, bawas ulit ng 1k pambili ng fund, 4k na lang ang SA mo.
So kahit 2k lang ang pera mo ngayon, pang-open ng account tapos sa June 15 mo pa napili na magbawas ang EIP mo, pwede ka ng mag-open ng EIP. sa June 15 babawasan nya ng 1k ang SA mo, pero since may sweldo ka at nag-deposit ng pera sa SA mo, above maintaining balance ka pa rin