I feel like I should post a pic of my boutiques (iPad/iPhone) just to show that it's entirely possible to have a decorated shop and give my strategy for the new players:
My oldest ipad shop:
I left the coin and level info on the pic. I recently expanded and renovated after Christmas. Coins are just now starting to accumulate again.
My new iphone shop:
Coins: 775,756; 40 Gems; Level 45 (screenshot from my other store so I couldn't see the info)
For the first 12 levels or so its hard to keep stocked. My strategy took time to develop in my original game. After understanding the game I started playing a second game on my phone and it took off very easily and I seem to make money much faster. What it took was persistence and patience through the beginning levels. I immediately mastered the 1 min catalog on day one. then the 5 min, 15 min. and so on. By the time I had enough coins saved up to order some new level items I blocked the door and mastered one or two racks at a time. Open up my doors over night and start all over upon waking the next day. Built up enough coins to start buying one nice rack at a time a putting the uglies in storage. Built up gems and buy one nice item every now and again, but try not to. I try to save my gems for limited items. But I noticed if I master an item before opening my doors then it stays full long enough for me to master an entire catalog. And just build slowly from there. Now I can keep my doors open almost all the time. If I notice I have less than 800 or so items on a rack I will close up shop and master that item before moving on to the next. In regards to the tasks, I only complete the timed goals and usually block the door until I'm back to business. I mastered most goals on my older game and honestly most of them were items that didn't match my design and seemed a waste of money that took ages to earn back. So on my new game I don't do the goals very often, and I seem to have progressed
much faster!
Hope that helps some newbie players get going...