Well I've been monitoring the buy orders at several exchangers and at this stage, it doesn't seem to show that there is a shortage of buyers. The decision is still up to you to finalize but in this condition it will be too difficult to predict the outcome. I think buying small but frequent will help to spread out the risks and have you get the price averaged out.
Buying multiple times to spread your avarage buy price is the wisest you can do at the moment. Predicting a valley is too difficult at the moment indeed and with daily fluctuations of 10-20 USD you can pick a nice spot during the day without too much problems imo.
The 3 btc at that price (10xx USD) is quite expensive, but I guess that's what you get nowadays.