I see the counter solutions are well thought out. Bravo!
I did not say that we should throw the kitchen sink at Mbappe. We have straight cash to offer. No installments, just money upfront. Maybe Monaco would be willing to lower the asking price if they'd get the money right away. We should try something like 130m + some bonuses doing the business. Could also involve Nike here. Seri + Inigo then for around 70m and we'd still remain with 20m + our remaining transfer money.
I get what you're saying but I think the board will prefer to pay 10-20M more (or include that money as bonuses) and still use installments than just pay all money upfront. We probably won't have 222M in cash to spend again in the near future so it would be dangerous to do that now because clubs would take notice and would demand as much money upfront again in future transfers but then we won't have that money.
Using your Mbappe's example I think they (board) would rather pay 150M+bonuses in 3-4 years instalments than pay 130M upfront. Of course if we could get that price down to 70-80M if we'd pay at once then they would do that but there is no way Monaco would accept to drop price that much just to get more money upfront (they don't need money that much after all players they've already sold). If we can lower total fee for "just" 10-20M then I think the board will prefer to stick with how big transfers are usually paid, so with instalments but it's possible our first instalment would be 60-70M instead of 40-50M.
That's also what I think Bartomeu meant when he said we won't use whole Neymar's money just to buy players. It doesn't mean we won't spend (more than) 222M in total fees for new players but using instalments in those transfers it's possible we'll "only" pay 150-170M (or maybe even less) upfront so we could use 20-30M of Neymar's cash to start renovation of Camp Nou and save the rest for next years.
I don't think we'll get Mbappe so I'll use Coutinho and Dembele who are our primary targets now alongside Inigo Martinez who I believe is already a done deal though we'll probably try to negotiate with Sociedad so they'll accept his transfer (so in the end we'll maybe pay 35M instead of 32M if we succeed with that but we'll keep good relationship with them) and we won't have to pay taxes as if he'd use his buy out clause.
Let's say we'll pay:
120M for Coutinho: 70M upfront, 20M in 2018 and 30M in 2019
110M for Dembele: 60M upfront, 30M in 2018 and 20M in 2019
32M for Inigo: all upfront as we'll have to pay his clause
So in total we'd pay 262M, but only 162M from that would be paid this summer.
Of course those numbers are just example and I have no idea if Liverpool and/or Dortmund will sell under those terms if they will sell at all.