What size unit do I need?
It depends on room size, ceiling height, insulation and how much sun the room gets. Tell Mac the room dimensions and he'll give you a straight answer rather than upselling you.
Can you supply the unit, or do I buy it?
Either. Mac can supply and install, or install a unit you've already bought. Just check with him before you buy so you don't end up with the wrong size.
Do I need extra electrical work?
Usually a split system needs its own circuit and an isolator. Because Mac is a licensed electrician, that's part of the same job rather than a second trade and a second bill.
How long does an install take?
A straightforward single-head split system is generally a day. Multi-head systems or tricky runs take longer — you'll be told before work starts, not after.