Sure, if that's way you like to do it, why not? It probably makes sense in your situation. It doesn't in mine.
If I were prepared to spend that kind of money on a single coin, I would budget an amount and start looking around. I wouldn't spend the money until I see a specimen that pleases me. I wouldn't grade the coins I see and I wouldn't look at the grade the seller gives it. I wouldn't worry about not getting a high enough grade for my money, because I wouldn't sell it. My taste would be the only deciding factor. It's not even a question of eye appeal, because that's not subjective enough.

Very important in my approach is never looking back. I don't keep records of what I paid, don't remember prices and don't care if I see a better specimen later. In fact, I bought most of my coins without consulting catalogue quotes or the internet. If I think it's worth it and I can afford it, that's enough. What counts very heavily is how badly I want the coin, though. That's not quite the same as chasing a coin. I look at what's available and decide what I like best.
Maybe an example might clarify that. In Madrid, I went around the market without a catalogue or want list. One dealer had a medal I liked. He wanted more money than I was prepared to pay. No deal. I enjoy going around and see some cheap, interesting counterstamped Spanish coins. Bought some. See some older Spanish coin that look identifiable to me but sit in a rummage tray. Got some, just for looking them up. In a lost corner is a lady with a bucket full of civil war emergency money. Got some. Got some more for friends. Enjoy sunshine. Talk to andyg and Spabreda, who have seen the medal and some more counterstampers. The medal is cheaper and better than the one I turned down. The counterstamped coins are too seductive not to add another sampling.
No planning, no specialisation, no inventory, badly updated want lists. Bliss for whatever I pick up. Grateful to friends. Make some happy with duplicates etc. It's a very relaxed way to go. I can recommend it.
Peter