I would not go by cost- but on quality.
Frames are a personal choice but every one seems to want C.F. Nowadays. But a $200 frame or one that costs a lot more?
Spec of the groupset and Most will agree that 105 would be the minimum- Ultegra better and Dure Ace far too expensive unless you really need it. Wheels and forget most machine built wheels- go hand built and one of the favourites are Ultegra Hubs mated to Mavic Open -Pro rims and a double butted spoke. You can go higher on spec and also lose wheel weight but Ultegra/ Open Pro is a high starting point. Then the anciliaries- and to an extent money spent on a saddle that is comfortable will be worth it and as you will rarely change bars- stems and other items- get as good as you can afford.
Sound expensive to get a Bike built in this way but looking at "Stock" bikesbuilt to this quality - you can start at around $1,000 and just go upwards. Might have to change a couple of things- like wheels and saddle but talk to the supplier and get what you need at this stage.
Just depends on what you do want on a bike.
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How long was I in the army? Five foot seven.
Spike Milligan