What equipment should I buy, apart from a Tractor

Background: My wife and I were both grew up on farms, but work has taken us to live in decent sized cities (in Australia if that matters). In the next year or 2, we are looking to buy farmland that is within commuting distance for my job in the city (my wife's work is more mobile and flexible) for our young family to grow up on. We maybe have an option to buy out my father in law's farm. The farms that we are looking at are between 50-200 acres, and we would operate them as mixed livestock (beef, sheep, maybe some pigs etc.), and most are just bare land and/or need substantial capital improvements. So building a house (or significant renovations)/driveways/shedding and fencing will all need to be undertaken.

I've loosely budgeted around 50k AUD for initial substantial equipment purchases (i.e. not implements), this will include 25k going to a used 80-100hp tractor, with FWA, loader and A/C cab. Given the substantial capital improvements required on the lands we have been looking, I was also looking at getting another piece of equipment (using the remaining 25k AUD I had budgeted) that can:

* Do trenching * Be better at general earthworks than a tractor * Operate a vibratory hammer for post-driving/fencing * Be able to shift/lift/stack round bales and be nicer for general loader work than the utility tractor (i.e. hydrostatic trans)

If we do buy my father in law out - his property is split into 2 farms about 800m (1/2 mile) apart on a gravel lane, so being able to road the item and not be bored to death would be a plus.

Used items I have been looking at that fit within my 25k AUD budget are and loosely meet this criteria:

* A full-size construction backhoe (JCB 3CX/Cat 428 etc.) - maybe a bit unwieldy? * A smaller TLB that can double as a compact tractor (Kubota L35/John Deere 110 were really the only ones sold in Aus) * A smaller Utility Tractor with a Backhoe attachment (not uncommon on a Kubota L series here) * Kubota R420 wheel loader with backhoe - this is currently my preferred option I think * JCB 1CX (skid steer loader with backhoe) * A 5-8 tonne mini excavator - obv. the best for earthworks etc. and I have seen them with a bale spike/grab for loading round bales, but maybe too specialised for a farm?

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Based on my situation, and all of your respective experience, are there recommendations you would make with the above list (and or other suggestions you might make?)