You guys are ruining a good thread with wishful thinking! Why not wish for cloaking devices,photon torpedoes and other Star Trek ish while you're at it!
Take the 2500 man USMC ToE as a guide
Qty Nomenclature Element
4 to 6 AH-1W SuperCobra attack helicopters aviation
6 AV-8B Harrier jet aviation
12 CH-46E Sea Knight medium lift assault helicopter aviation
4 CH-53E Super Stallion heavy lift assault helicopter aviation
2 KC-130 Hercules re-fueler/transport aircraft
Note: usually maintained in the continental United States aviation
3 UH-1N Twin Huey utility helicopter aviation
6 155mm howitzer: M777 ground
15 Assault Amphibious Vehicle ground
8 BGM-71 Tube-Launched, Optically-Tracked, Wire-Guided (TOW) missile weapon system ground
8 FGM-148 Javelin anti-tank missile ground
7 to 16 Light Armored Vehicle ground
4 M1A1 main battle tank ground
8 M252 81mm mortar ground
3 D7 bulldozer logistics
1 LMT 3000 water purification unit logistics
1 Medium Tactical Vehicle Replacement dump truck logistics
4 Mk48 Logistics Vehicle System logistics
2 Reverse Osmosis Water Purification Unit logistics
4 Tractor, Rubber Tire, Articulated Steering logistics
2 TX51-19M Rough Terrain Forklift logistics
7 500 gallon water containers multiple
63 Humvee multiple
30 Medium Tactical Vehicle Replacement trucks multiple
Bear in mind these are 2500 guys and while its a typically tech and logistically heavy American formation its primary function is expeditionary warfare,ie an independent expeditionary force,with organic air/combat engineering/armour and arty which is the primary purpose of any Marine unit. Base your PMEF on them. To be realistic give yourselves a reasonable timeline,maybe 5 years. No government will throw some 5 bn $ at the Navy and say "here,nigga,go buy a marine expeditionary force!"