FUE or FUT debate always exists.You can clear your doubts with Dr Lindays (what school of thoughts he has )and then you can decide .
1800 grafts can be easily done with FUE or FUT. Depending on donor density one can undergo multiple fue procedures. Infact you can use half of your donor area and other half will still be virgin for future uses. if you have good body hair that can be an extra source.