Yeah, I have warned about the cost, we have around 120 servers, have been given a deal by MS, but its looking like a mixed bag of PaaS, MI and IaaS, even a lift a shift isn't going to cut it with some apps we have. Is an absolute headache as a while ago, the company replaced a lot of staff, so simply finding business owners has taken 3 months so far. As the sole DBA (I am a contractor and the job was supposed to be BI DBA, not Enterprise DBA, but lucky me! ), due to Perm staff leaving and waiting for new Perm to start, I am also doing BAU on a lot of servers that have needed some loving for years due to the nature of the old 'DBA's. So, not only did they not have a standard build, they had no standards at all, backups are a mixture of CommVault with the odd local tran log, no tran log backups, servers that pop out of the woodwork only when they go wrong etc. Trying my hardest to pull it into some form of order before they even start. Its all great fun..
Oh, and no monitoring tools to boot, have asked for Redgate or Idera for our so called critical servers and going OMS for the rest.