i did the same thing , eventually you will have to pay for the store or your sales will come to a screeching halt. The eBay algorithm favors listing everyday and will give you the same ratio of items listed , items sold. Unless your in a very specific Niche like high end watches or purses, as an example. Personally i would like to get my listings up to around 500 items with 5 sold per day at a 20.00 net profit per sale. Sell through rate is the big factor , with an average of 80 % sell through on all inventory i think this is not an easy goal but one that is achievable. Of course these numbers can be moved around with higher sell through ratio and such and everyone has different goals. It may turn out that we hit a windfall of fast sell through high profit items as i have seen seller stores that list 20 items that sell for many thousands of dollars. I know first hand raising a child is not easy but i think you could easily handle listing five a day or even three a day, as you seem to be good at sourcing. Thanks for sharing ! The store subscription will provide some free tape or boxes at the end of each quarter if that helps you justify the expense and its also another business cost that may help a little with tax filings.

So did u get a subscription?