Advice on e46 320i purchase

Hi all, this is my first post on here so I'm not sure if I'm even posting in the right category. I'm looking for some advice as I'm considering buying an 03 320i as a daily. I've done a fair amount of research but I can't seem to find all the info I'm looking for. I've read that the cooling system on these tend to be problematic so how much could I estimate for an overhaul on that? Apparently I can look to replace the expansion tank, thermostat and waterpump first? It looks to be an elderly couple selling the car and from the pictures it does look very neat. This one has quite low mileage too at 149k km and according to them full service history too. I haven't gone to look at the car yet but plan to and a mechanic friend will be accompanying me. 
The main purpose for the car will be commuting but I also don't want to be completely bored while I drive (I come from an 06 Tiida so I'm sure this will be a step up in the fun area at least). From everything I've read the m54b22 is very reliable if taken care of, just like most cars I guess. I don't mind a few quirks here and there but I want the overall reliable bmw for the amount I'm paying. I also don't mind paying for a cooling system overhaul shortly after the purchase if it's not too expensive. So yea, would this be a good option for me? This car costs R62,000. I've attached pictures below so I'm hoping that worked. Thanks in advance for any input. 

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