You want us to be ambitious, and sign a better player for the position. Lallana was an ambitious signing. Therefore, I used Lallana, a player we spent big money for, as an example of an ambitious signing. I'm saying we can't sign a dozen players to fill our first team holes and bench that are all highly sought after, expensive players. Especially backup fullback.
If we lose Suarez, we need to spend big on another striker. We've already spent important money on the Winger/CAM spot in Lallana, and look to again in Markovic/Shaqiri in order to add options to our attack. We spent 10M+ on Emre Can to play CM/CDM already, where we needed options to supplement/supplant Lucas/Gerrard/Allen.
Now we're looking at spending 20M on helping central defense. I suppose goalkeeper is lower on the list, as we just need an improved backup for Mignolet.
So that leaves us at in priority...
1a.Winger/CAM
1b. Striker
2. CB
3a. CM
3b. Fullback
4. Goalkeeper
We can spend as much as we'd like, you're right. But realistically, that's not a position we need to be spending big money at, especially LB. If we sell Johnson, I can see us bringing in another high quality option, and spending money there. But otherwise, I would be content if we spent 6M on Bertrand, and left it at that, assuming Enrique can get healthy this offseason.
If Enrique is FUBAR though, then I could see us investing in a long term option at LB. That is knowledge I don't have.