Mission, Mission, Mission.
I've been an owner since 2006. A cub is great for dicking around low or landing on riverbanks if that is your thing - but as others indicated - a few things:
1. MONEY. Are both you and your partner financially able to afford it?
2. Depreciation: Hate to break it - but $120,000 depreciates 20% in the first year. Find a used bird where it has a good MX history and someone already ate the depreciation.
3. MISSION - what is your gameplan? Do you plan to be bumping around the mountains in and out of 2000 ft strips with no STOL or Turbo?
4. Join an owners group - see what their typical threads are on MX, operations and headaches. Not everyone will post, but you'll notice things that are nuisances in type clubs (i.e. worn turbo brackets, corrosion areas, etc)
5. A partnership is a marriage (yes, no toejam). Have an LLC or some type of seperate entity created where the aircraft will reside so your assets will not be at risk incase of an accident and lawsuit. This won't necessarly prevent you from being sued for some roadkill claim, but if you have your liability limits set high enough, it won't matter. Have a clear exit strategy from the partnership if your mission requirements diverge from your partners. *i.e. if A wants out, you sell at loss and divide the difference, or he buys you out at X - the prorata engine hour.
6. Calculate the per hour reserve. Its not just gas and oil. I'll give you an idea of how mine looks on a per hour basis.
Cirrus SR-20
Assumptions:
- -
Fuel burn @ cruise 9.5
Fuel cost $3.50
Oil burn @ cruise 0.08
Oil cost $7.65
Filter cost $20.00
Annual inspection $3,000.00
Static sys./xpdr checks $500.00
Oil change $350.00
Engine life 2000
Engine OH cost $37,000.00
Prop life 2400
Prop OH cost $2,000.00
Registration, state $400.00
Insurance $1,660.00
Hangar/tiedown $100.00
Preventive Maintenance $4,000.00
Paint $12,000.00
Interior $8,000.00
Tire cost *3 $360.00
Tire life 800
Turbo life 1000000
Turbo OH cost $0.01
Top-end life 2000
Top-end OH cost $0.01
Sparkplug life 500
Sparkplug cost $258.24
Vacuum pump life 100000
Vacuum pump cost $0.00
Direct = $75.08 /hr.
Indirect = $8,176.67 /yr.
And, the total annual cost for flying is $25,445 /yr based on 20 hours per month
And the DOC broken down as performance numbers for my aircraft:
Cirrus SR-20
(OperateLOP)
Engine HP, max. 200
Fuel, usable 52
Fuel consumption @ 75% 10
0.39
Endurance 75% - no reserve 5.2
Speed @ 75% 140
Distance, max. 728.0
Cruise Performance
Power, cruise 70%
Speed, cruise 137
Fuel consumption, cruise 9.3
Endurance, cruise 5.6
Distance, cruise 762.3
Fuel economy 14.7
Trip distance 1200
Trip time 8.8
Trip cost $970.29
Passengers + crew 4
Aircraft operating cost $110.63
$0.81
Trip cost/person $242.57
Gross weight 3000
Basic empty wgt 2083
Useful load 940
Fuel, max. 52
Payload 628
Number of partners 1
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These are big numbers. If you aren't mentally prepared for big numbers don't do it.