As long as you don't plan for a full rewrite all at once the technical part is not the hardest aspect, it's even the best part! > fix this development team wit

As long as you don't plan for a full rewrite all at once the technical part is not the hardest aspect, it's even the best part! > fix this development team without managing them directly This is the worrying part. If you're not their manager, or at least the technical lead dev it's a lost cause. Because you need to laid a plan and have complete buying from management. There's almost no realistic salary that can make it for working on (I presume) PHP 5 and this codebase forever and the effect on your career future prospects.