Children out-grow the toys very fast. It may be wiser to rent2play for a short period. They get more variety of toys to play with and you have more savings afterall. Also, you will not have the storage problem of bulky toys.
Or you may love to get your kid this particular expensive and bulky toy, but just not too sure if she likes it. Renting it gives you a trial, before you buy it. This saves you from getting something that your kid does not like.
You may be just renting it for a month of your relative's visit. There is no need to buy toys to entertain the kids. They get to play different toys during each visit. For those who comes to Singapore for a short visit, you need not bring along so many of your kid's favorite toys. Renting is an easier solution.