A 730 horsepower Scania is a ridiculous suggestion for a private user. It is only of interest to the super rich or a professional outfit transporting top flight racehorses or international level show horses, and then only for its bling value.
If the OP who I assume is a private buyer wishing to carry two or three owned horses, gives a little more info regarding intentions then maybe contributors can help more. Scania have a fan-boy following much of it blind to any criticism, Daf have detractors galore with many keen to jump on the bandwagon but with little personal evidence to back it up other than hearsay.
All makes have their faults equally they have their strengths, it is value for money represented by the initial purchase price as new related to the ongoing cost of ownership which matters. The DAF LF chassis is a fairly cheap lightweight design intended to sell in large numbers, principally as a 7.5 tonne vehicle but extending up the 2 axle weight range, to customers whose work is not relatively demanding nor often utilising the vehicle’s maximum potential gross weight. That doesn’t mean to say that some don’t use the vehicles hard. DAF as has been mentioned make a medium weight CF range and a heavyweight premium XF chassis. Scania do not compete directly with the LF, their lightest offerings are 2 axle vehicles usually bought to run at or near their maximum weight. The Scania image really revolves around their maximum weight tractor units for sale at a significant premium price but with cab spec and engine power variations to attract the fleet purchaser.
The four cylinder engine in the LF is a proprietary unit fitted to numerous different types of vehicle at different horsepower ratings. It performs perfectly satisfactorily in city buses which is probably the most demanding role it could be asked to undertake. At its 180 bhp setting it should be perfectly adequate for private horse transport, it won’t be a flying machine but that presumably is not what is wanted. What would not be a good idea is to alter its Hovis box body style to the extent of building over the top of the cab this effectively expecting the vehcle to push a barn door through a gale.
One issue I can see possible is that a bread delivery lorry of around 15t GVW is likely to be either on the longest wheelbase chassis available or have the maxiumum permissable rear overhang and to be unsuitable for the intended use without chassis alterations.